56227778389 has 4 divisors (see below), whose sum is σ = 57599187660. Its totient is φ = 54856369120.

The previous prime is 56227778357. The next prime is 56227778401. The reversal of 56227778389 is 98387772265.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26909777764 + 29318000625 = 164042^2 + 171225^2 .

It is a cyclic number.

It is not a de Polignac number, because 56227778389 - 2⁵ = 56227778357 is a prime.

It is a super-3 number, since 3×56227778389³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56227778389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56227778309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685704574 + ... + 685704655.

It is an arithmetic number, because the mean of its divisors is an integer number (14399796915).

Almost surely, 2^56227778389 is an apocalyptic number.

It is an amenable number.

56227778389 is a deficient number, since it is larger than the sum of its proper divisors (1371409271).

56227778389 is a wasteful number, since it uses less digits than its factorization.

56227778389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371409270.

The product of its digits is 71124480, while the sum is 64.

The spelling of 56227778389 in words is "fifty-six billion, two hundred twenty-seven million, seven hundred seventy-eight thousand, three hundred eighty-nine".